{"id":"CVE-2026-5807","aliases":["GHSA-88v5-9hxc-f85r","BIT-vault-2026-5807","GO-2026-5247"],"title":"HashiCorp Vault Vulnerable to Denial-of-Service via Unauthenticated Root Token Generation/Rekey Operations","summary":"HashiCorp Vault Vulnerable to Denial-of-Service via Unauthenticated Root Token Generation/Rekey Operations","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","vendor":"hashicorp","product":"github.com/hashicorp/vault","ecosystem":"go","affected":["github.com/hashicorp/vault <= 1.21.4"],"published":"2026-04-17","updated":"2026-09-10","sourceUpdated":"2026-09-10T03:50:43.840008232Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-88v5-9hxc-f85r","references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-5807"},{"url":"https://access.redhat.com/security/cve/CVE-2026-5807"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2459109"},{"url":"https://discuss.hashicorp.com/t/hcsec-2026-08-vault-vulnerable-to-denial-of-service-via-unauthenticated-root-token-generation-rekey-operations/77345"},{"url":"https://github.com/advisories/GHSA-88v5-9hxc-f85r"},{"url":"https://github.com/hashicorp/vault"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5807.json"}],"tags":["osv","go"],"epss":0.00718,"epssPercentile":0.52387,"ingestedAt":"2026-07-21T19:04:58.487Z","slug":"CVE-2026-5807","body":"## Overview\n\nVault is vulnerable to a denial-of-service condition where an unauthenticated attacker can repeatedly initiate or cancel root token generation or rekey operations, occupying the single in-progress operation slot. This prevents legitimate operators from completing these workflows. This vulnerability, CVE-2026-5807, is fixed in Vault Community Edition 2.0.0 and Vault Enterprise 2.0.0.\n\n## Affected packages\n\n- `github.com/hashicorp/vault <= 1.21.4`\n\n## Remediation\n\nRefer to the advisory for the patched release.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}